Fluid controlling device



Jan. 26, 1932. BQ KRAMER 1,842,788

FLUID coNTRoLLING DEVICE Filed March 4, 1950 72 26 /n venof':

ernzard KKH/VER.

Patented Jan. 26, 1932 PATENT YOFFICE BERNHARD KRMER, 0F HALLE, GERMANYFLUID coNfrRoLLiNe DEVICE Originaly application led November 28, 1928,Serial No. 322,536, and in Germany November 28, 1927. Divided and thisapplication filed March 4, 1930. Serial No. 433,141.

This invention relates to a valve for steam conduits and the like and ofthe kind comprising a cock plug which is supported in a valve casing bymeans of co-aXial spindles and by balls or barrel rollers engaging saidspindles so as to be itself maintained out of actual contact with thecasing and allow of being easily turned for the rapid, though incompleteclosing of the conduit in case of pipe fracture, casing and plug formingtogether a Venturi passage.

This application is a division of application No. 322,536, filed Nov.28, 1928.

The invention consists in providing the valve with means, controlled bythe pressure dierence in different parts of the Venturi passage forclosing the valve automatically in case of pipe fracture.

Fig. 1 of the accompanying drawings represents a longitudinal horizontalsection of the valve taken on the line A-B of Fig. 3. Fig. 2 is asection on the line C-D of Fig. 1 and Fig. 3 is a side view of the valveand the closing device.

The cock casing 11 is tted with a cock plug 12 which is supported in thecasing by means of two coaxial spindles 13 and by means of balls orbarrel rollers 14. The plug is mounted in the casing with sulicient 30clearance, say about 0.5 mm. to allow of being freely movable butwithout passing, when in its closed position, any material quantity offluid. Thus the cock can be easily closed and will, in the case of steampipe fracture, :i5 prevent the boiler from being exhausted, or

the attendants from being scalded.

The plug 12 is provided with a steam passage 15 like a Venturi pipe, andthe casing 11 is fitted with annular connecting members 10 which adjointhe plug passage and which,

like the latter, are flared outwards for connection to the conduit 45.

The bearing plates 18 at opposite ends of the plug 12 are tightened tothe latter by means of labyrinth packings 18.

The spindles 13 are formed with extensions 16 which pass throughtightening glands 17. One of said extensions is squared for thereception o'l a lever 2O which carries at its free l end 25 anadjustable weight 21. The latter 50 tends to maintain thehorizontallyearranged valve in its closed position which is determinedby the abutment of the lever 20 against a stop 26 on the casing. Formaintaining f the valve. in open position, a bolt 23 is pro- 55 videdwhich is guided in brackets 43 on the casing and controlled by a spring22 whereby it is held in engagement with an ,aperture 24 in the lever20. The bolt 23 is eyed for connection to a cable 41 which is guidedover a w sheave 44 and connected at its opposite end to a double-armedlever 29. The latter is arranged to rock about a pivot 37 connected to asupport 38. On the end of the lever 29 opposite the cable l0 a closedvessel 28 is sus- 65 pended by means oi' a pivot 33. This vesselcommunicates, through a liexible pipe 32 with another closed vessel 27which is rigidly supported and which is charged with mercury or othersuitable liquid the communication between the two vessels being at thebottom so that the mercury can be transferred from one to the other. VApipe 30, which communicates with the upper portion of the vessel 27,opens at 31 into one of the rings 10 so as to communicate the pressurein the conduit to the two vessels. The vessel 28 encloses arigid pipe 34which rises from the bottom thereof and which is connected by means of aflexible pipe toa rigid pipe 36. The latter opens at into the narrowestportion of the valve passage. The vessel 29 is counter-balanced byaweight 39 so that under normal conditions the bolt 23 will bemaintained by the spring 22 in engagement with the lever 20.

In the arrangement shewn, the Huid is supposed to pass through the valvecasing from left to right. Owing to the contraction of the valvepassage, the pressure at the point 31 will be greater' than at the point35. In case of pipe fracture at the right side of the valve, thepressure difference will be increased, and liquid will be forced fromthe vessel 27 into the vessel 28 so as to add weight to the latter andcause the lever 29 to trip in opposition to the cable, the bolt 23releases the lever 2O and allows the weight 2l to close the valve.

The same closing` operation of the valve will take place in the case ofa pipe fracture at the left side of the casing so as to cut off, say, aboiler at the right side of the valve when the latter is arranged in aconduit which connects two boilers.

Naturally the bolt 23 can also be withdrawn by hand for rleasing theclosing arm.

The device can also be used for reducing to a given extent the supply ofdriving fluid lto a machine.

I claim:

1. The combination with a valve of the kind referred to, of means,controlled by the pressure difference, at'different points of theVenturi passage, for closing the valve automatically in oase of pipefracture, comprising a weighted lever secured to the valve spindle andtending to close the valve, a spring controlled detent forl retainingthe valve normally in open position, a pair of communicating vesselscharged with Vmercury or the like and connected to valve casing, one ata narrow and the other at a wide part of the Venturi passage so thatliquid will be forced from one vessel into the other owing to theincrease in the pressure difference in case of a pipe fracture, one ofsaid vessels being suspended from one end of a weight` balanceddouble-armed lever so as to cause the latter to trip on a change in thegravity due to the transfer of liquid from one vessel to the other,rthelever beingv connected to said detent so as to release the valve whenthe lever is tripped.

2. A control device for fluids comprising a casing, connections t-tingin saidcasing, a valve plug mounted within said casing, a spindlecarried by said plug, a control arm carried by said spindle, acounterbalanced lever, a spring influenced stud carried by the casingfor engagement with the control arm,

means connecting said stud with one end of said counterbalanced `leverand means for moving the other end of said counterbalanced lever forwithdrawing said stop to release the control arm on increase of pressurein said connection.

V3. In a control device for fluids, Va casing, tapered connectionsfitting in said cas ing, a valve plug mounted within saidrcasing, aspindle carried by said plug, a control arm fixed with said spindle,means for locking the movement of the control arm, a fixed vesselcontaining mercury, a fluid connection between said vessel and saidtapered connection, a counterbalanced lever, a ves- BERNHARD KRMER.

CERTINCATE 0F CQRRECTQON.

Patent No. 1,342,788. January 26, 1932.

BERNHARD KRMER.

it is hereby certified that the above numhem paient was erroneousyissued to the inventor said "Krme" whereas said @mam shoud have beenissued to "the firm Elekmwerke Aktiengeselsclmft, of eril., Germany". asassignee. nf the enre inerest n said invention. as Shawn h3' he records`0f assignments in this oce; and ha he said Letters Fatemi should be readwith this correa tion ncren that the sash@ may conform to fha rasoi-d ofthe case in the Patent Uffice.

Sigle and seaed hs 24th day of Jahuary, A. D. 1933.

h, j. Mam-e, (Seal) Acting Commssoucr of Patents.

